DNSProxy logging level does not change

[admitrevskiy]

Steps to reproduce:

-Enable DNS Filtering
-Go to Settings -> Advanced -> Logging level and switch to Record everything
-Examine log

Expected result:
-There are verbose DNSProxy log messages in the log

Current result:
-DNSProxy logging level is not changed until you restart DNSProxy

[admitrevskiy]

Done.

Testing instructions for QA:

• Reinstall AG
• Select default logging level
• Enable DNS filtering
• Enable protection
• Change log level to Record everything
• Remember the time when you switched on verbose logging
• Surf the web
• Export logs
• Examine the logs. You will see full logs for DNS requests (Question/Answer/Authority sections etc.)